The gas hole , shrinkage cavity and crack were eliminated through up - grading technology.

并且改进工艺,以消除气孔 、 收缩和裂纹.

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Increase in inserted depth of crystallizer could eliminate gas hole and porosity.

将结晶器插入深度增加,可使气孔、缩松问题得到解决.

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The reasons resulting in the shrinkage porosity, gas - hole and impacted sand in bronze castings were analyzed.

分析了锡青铜叶轮铸件出现的缩孔 、 气孔、冲砂等缺陷的原因.

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